as have a ticket for this to disable the reminders again, as showing them was only a side effect of a previous change. The ticket can be reached through https://jira.kopano.io/browse/KC-565, but so far there is no clear path to fix this.

On the other hand when using KOE there is a client side configuration setting to influence this.

We are currently testing KOE on Outlook 2013/2016 but the shared folders do not show up as we want. Some of our users have a lot of shared mailboxes to open and therefore is it isn’t usefull to see 8 different inboxes.

Also we have have very good experience with the Zarafa client so if not a complete must we don’t want to migratie completely yet.

Some of our users have a lot of shared mailboxes to open and therefore is it isn’t usefull to see 8 different inboxes.

what do you mean here with “different mailboxes”? through the shared folder functionality currently the calendar will be included in you own mailbox and not as a dedicated store (even though that is also an often requested feature that we are currently investigating).